Exam 10: Meiosis and Sexual Life Cycles

Use the following information to answer the next questions. There is a group of invertebrate animals called rotifers, among which a particular group of species reproduces, as far as is known, only asexually. These rotifers, however, have survived a long evolutionary history without evidence of having been overcome by excessive mutations. -If we continued to follow the cell lineage from question 3, then the DNA content of a single cell at metaphase of meiosis II would be

Refer to the life cycles illustrated in Figure 10.1 to answer the following questions. Figure 10.1 -Which of the life cycles is (are) typical for most fungi and some protists?

Refer to the life cycles illustrated in Figure 10.1 to answer the following questions. Figure 10.1 -Which of the life cycles is (are) typical for plants and some algae?

Which of these is a way that the sexual life cycle increases genetic variation in a species?

Eukaryotic sexual life cycles show tremendous variation. Of the following elements, which do all sexual life cycles have in common? I. Alternation of generations II. Meiosis III. Fertilization IV. Gametes V. Spores

The following question refers to the essential steps in meiosis described below. 1. Formation of four new nuclei, each with half the chromosomes present in the parental nucleus 2. Alignment of homologous chromosomes at the metaphase plate 3. Separation of sister chromatids 4. Separation of the homologs; no uncoupling of the centromere 5. Synapsis; chromosomes moving to the middle of the cell in pairs -For a species with a haploid number of 23 chromosomes, how many different combinations of maternal and paternal chromosomes are possible for the gametes?

Which is the smallest unit containing the entire human genome?

Which of the following might result in a human zygote with 45 chromosomes?

Refer to the following information and Figure 10.4 to answer the following questions. A certain (hypothetical) organism is diploid, has either blue or orange wings as the consequence of one of its genes on chromosome 12, and has either long or short antennae as the result of a second gene on chromosome 19, as shown in Figure 10.4. Figure 10.4 -A female with a paternal set of one orange and one long gene chromosome and a maternal set comprised of one blue and one short gene chromosome is expected to produce which of the following types of eggs after meiosis?

Refer to the following information and Figure 10.4 to answer the following questions. A certain (hypothetical) organism is diploid, has either blue or orange wings as the consequence of one of its genes on chromosome 12, and has either long or short antennae as the result of a second gene on chromosome 19, as shown in Figure 10.4. Figure 10.4 -If a female of this species has one chromosome 12 with a blue gene and another chromosome 12 with an orange gene, and has both number 19 chromosomes with short genes, she will produce which of the following egg types?

Chromatids are separated from each other.

In a human karyotype, chromosomes are arranged in 23 pairs. If we choose one of these pairs, such as pair 14, which of the following do the two chromosomes of the pair have in common?

Referring to a plant's sexual life cycle, which of the following terms describes the process that leads directly to the formation of gametes?

Which of these statements is false?

Which of the following is an example of alternation of generations?

Which of the following best describes a karyotype?

Experiments with cohesins have found that

The human X and Y chromosomes

Which of the following happens at the conclusion of meiosis I?

Refer to the following information and Figure 10.4 to answer the following questions. A certain (hypothetical) organism is diploid, has either blue or orange wings as the consequence of one of its genes on chromosome 12, and has either long or short antennae as the result of a second gene on chromosome 19, as shown in Figure 10.4. Figure 10.4 -A certain female's number 12 chromosomes both have the blue gene and number 19 chromosomes both have the long gene. As cells in her ovaries undergo meiosis, her resulting eggs (ova) may have which of the following?